Printing machine



Oct 1941. A. PQTDEVINV 2,260,402

PRINTING MACHINE Origihal Filed Aug. 20, 1936 fiNVENTOR ATTORNEYS Patented Oct. 28, 1941 Adolph Potdevin, Garden City, N. Y., assignor to Potdevin Machine Company, Brooklyn, N. Y., a corporation of New York Original'application August 20, 1936, ,Serial No. 96,913. Divided and this application'January 28, 1939, Serial No. 253,398

6 Claims.

This invention relates to improvements in printing presses and is particularly directed to means for adjusting the printing rollers.

The application is a division of my copending application Serial No. 96,913, filed August 20,

I 1936 Patented October 3, 1939, No; 2,174,728.

In machines of the character indicated, in printing sheets, bags or other articles it is essential that the printing be imprassed accurately on the article and with prior machines it becomes necessary, due to slippage of the material, to stop themachine while adjustments are made.

It is one of the objects of the present invention to provide a machine wherein the printing rollers can be adjusted transVer-sely of the machine and peripherally of the rollers so as to print articles in proper register. l

Other objects of the present invention will be manifest from the following description and the accompanying drawing.

Fig. 1 shows in vertical elevation and in part section a printing roller and the adjusting mechanism therefor;

Fig. 2 is a view on the line 2-2 of Fig. 1; and

Fig. 3 is an end view.

Referring 'to the drawing in detail: 2 designates the side frame of the machine supporting a drive shaft 3 secured to which is a drive gear 6 which is connected to any suitable drive (not shown).

Mounted on the drive shaft 3 is an impression n roller 8. Parallel to the impression roller 8 is a shait i which carries a printing roller i2. This shaf't |0 is mounted in adjustable bearings whereby the printing roller may be adjusted longitudinally, as will be brought out in more detail hereinafter.

Affixed to the shaft i0 of the. printing rolleris a gear i8 in constant mesh with a gear loosely mounted on the shaft 3.

One side frame 2 of the machine, as seen in Fig. 1, is provided with a bracket 22 supporting one end of a non-rotating stub Shafi'. 24, 'this stub shaft being equipped with a helical pinion 25. The pinion 26 is provided with a hub 23 on which is keyed a pinion 30. The pinions 25 and which are fixed together -are adapted *to be moved transversely with the shaft 2-3. The end of the shaft 24 where it projects through the side frame 2 is screw-threaded and mounted in 'a rotatable threaded sleeve 34. This sleeve is equipped with a knurled head so that the sleeve may .be rotated in the side frame 2 to move the helical pinion 28 and the straight-faced pinion 30 toward and away from the side frame.

The pinion 26 meshes with a helical gear 38 which is fixed to the :drive -shaft 3. The gear 20, it is to be remembered, is loose on the shaft 3.

The drivefor the printing roller i2, it will be seen from the foregoing, is 'through the drive gear 6, shaft 3, gear 38 which' is fixed on the shaft 3, helical pinion 26, straight-faced pinion 30, gear 20 which, as above mentioned, is loose on i8 which is fast on the the shaft 3, and the gear shaft l0 of the printing roller.

To adjust the printing roller i2 peripherally V while the machine is in operation, it is merely `necessary to rotate the sleeve 34 through the medium of the knurled ,head 3G thereby causing endwise movement of the stub shaft 24 and a like movement of the helical pinion 26 and straightfaced pinion 30. 'I hls movement may be right or left, as the case may be, as viewed in Fig. 1. This movement of the helical pinion 26 across the face of the gear 38 will, as will be evident, effect a slight'rotation of the helical pinion and inasmuch as the pinion's 26 and 30 are fast'to each other' the same rotation will be 'given to the straightfaced pinion 30, loose gear 20 and gear i8 which is fast on the shaft nu of the printing roller, thereby to effect a speeding up or slowing down, as the case may be, of the printing roller. This adjustment, it will beappreciated, .can be accomplished while the machine* is running when the operator can see the effect of 'the same. In

other words, should the operator notice that there i-s a misalignment of the printed matter lengthwise of the sheet being printed hemerely rotates the lmurled head 30 of the sleeve' i in the right direction until' the same is corrected.

In the event of a lateral misalignment of the printed matter on the sheet, the printing roller i2 is adjusted longitudinally, instead of circumferen'tially, transversely of .the machine. This is accomplished by means of the bearings i4 and IS for the printing roller shaft i0; Each of these bearing members is in the form of a tube 39, one I of which is provided on its exterior with a rack t0 and the other with a rack`42, the rack 40 meshing with a pinion 40 and !the rack 42 meshing with a pinion t6. These pinions may be rotated by any suitable means and upon rotation or either of them the shaft w will be moved lengthwise, imparting similar movement to the printing roller i2 to adjust the printing roller transversely of the sheet being printed, as will be understood. i V

The bearing-s la and .i6 are slotted as shown at i5 and i1, respectively, to receive the ends of the printing roller shaft i0 whereby the shaft 'lo can be removed when the tubular members 3s are wlthdrawn sumciently outwardly oi.' the machine for the bearing members Il and Il to clear the ends of 'the shai't.

Within the tubular meniber 39, which isa part of the bearing ll, is provided a screw la for flner' provided with a head 52 to facilitate rotation oi the screw while a wing-nut 55 is provided to lock the screw in adjusted position. The tubular member 39 which carries the bearing member IG en-,

closes a coil spring 56 which abuts the end of the the shaft lo. The outer end of the screw 48 is shaft lo and the end wall of the bearing. It will be obvious thatupon rotation of the screw 48 in one direction the shaft lo carrying the printing roller will be moved longitudinally transversely of the machine against the tension of the spring 56 and upon rotation of the screw 48 in the opposite direction the spring will force the'shai't lll and hence the printing roller i2 in .the opposite direction.

It 'will be seen from 'allof the foregoing that I have provided for adjustment of the printing roller longitudinally and for adjustment of the printing roller circumferentially, both adjustments being efiected without the necessity of stopping the machine.

It will be understood that various changes and inodiflcations may be made in the structures here in illustrated and described without departing from the spirit and scope of my invention.

1. A device of the class described comprising in combination a pair of cooperating rollers providing a' printing couple, a drive therefor, including adrive shaft common to 'both rollers, the drive for one of said rollers including a helical gearcarried by said drive shaft and a cooperating helical pimon movable relatively thereto to effect peripheral adjustment of said roller with respect to the other roller of the pair.

2. A device of the class described comprising a pair of rollers providing a printing couple, a

drive therefor including a drive shaft common ..to

` both rollers, said drive including a helical gear carried by said drive shaft ,and a cooperating pinion movable relatively' thereto to advance or retard one of said rollers relatively to the other peripherally..

3. A device of the class described comprising a pair of rollers providing a printing couple, a drive .therefor including adrive shaft common to both rollers, said drive including a helical gear.

fast on said drive shaft, a cooperating pinion movable relatively thereto to advance or retard one of said rollers peripherally relatively to the other, and manually operable means for efi'ecting said movement of the pinion relative to said helical gear while the rollers are rotating. V

4. A device of the class described comprising a pair of rollers providing a printing couple, a drive for the printing roller of the couple including a helical gear and a helical pinion meshing therewith, a straight-faced pinion fixed to. said helical pinion, a gear meshing with said straightfaced pinion, said gear meshing with a gear on the .shaft of said printing roller, and means for moving said helical pinion across the face of its cooperating helical gear while both pinion and gear are rotating, thereby to effect a Variation in of the pinion relative. to said gear while the rollers are rotating, and means for moving one of said rollers longitudinally relatively to the other'while therollers are rotati ng,, whereby longitudinal and peripheral adjustment of one of said rollers is efl'ected. v

6. A device of the class described comprising in combination an impression roller and a cooperating printing roller, a drive shaft common to both rollers, a pair of gears carried by said drive shaft, one of said gears being a helical gear fast on the shaft, the other 'a straight-faced gear loose on the shaft, a shaft for carrying the printing roller, a straight-faced gear aflixedthereto and meshing with said-first mentioned straight-faced gear, a helical pinion meshing with said helical gear, a straight-faced pinion fast therewith and meshing with said loose gear; and means for ef fecting movement of said helical pinion across the face of said helical gear while said rollers are being driven to accelerate or retard said printing roller 'relatively to the impression'roller. i ADOLPH POTDEVIN. 

